Reduce diff to haskell/master

[curiousleo]

This just reduces the diff in https://github.com/haskell/random/pull/61 by removing some commented out configuration and code and checking out some files to be the same or similar to what is on haskell/master.

Before

❯ git diff --stat haskell/master..idontgetoutmuch/v1.2-proposal
[...]
 42 files changed, 4010 insertions(+), 1609 deletions(-)

After

❯ git diff --stat haskell/master..idontgetoutmuch/reduce-diff
[...]
 41 files changed, 3704 insertions(+), 1586 deletions(-)